High-Statistics Measurement of Collins and Sivers Asymmetries for Transversely Polarized Deuterons

. 2024 Sep 06 ; 133 (10) : 101903.

Status PubMed-not-MEDLINE Jazyk angličtina Země Spojené státy americké Médium print

Typ dokumentu časopisecké články

Perzistentní odkaz   https://www.medvik.cz/link/pmid39303248

New results are presented on a high-statistics measurement of Collins and Sivers asymmetries of charged hadrons produced in deep inelastic scattering of muons on a transversely polarized ^{6}LiD target. The data were taken in 2022 with the COMPASS spectrometer using the 160 GeV muon beam at CERN, statistically balancing the existing data on transversely polarized proton targets. The first results from about two-thirds of the new data have total uncertainties smaller by up to a factor of three compared to the previous deuteron measurements. Using all the COMPASS proton and deuteron results, both the transversity and the Sivers distribution functions of the u and d quark, as well as the tensor charge in the measured x range are extracted. In particular, the accuracy of the d quark results is significantly improved.

<a href= https ror org 00ad27c73 >A 1 Alikhanyan National Science Laboratory< a> 2 Alikhanyan Br Street 0036 Yerevan Armenia

<a href= https ror org 01ggx4157 >CERN< a> 1211 Geneva 23 Switzerland

<a href= https ror org 01vj6ck58 >Torino Section of INFN< a> 10125 Torino Italy

Abdus Salam ICTP 34151 Trieste Italy

Academia Sinica Institute of Physics Taipei 11529 Taiwan

Affiliated with an institute covered by a cooperation agreement with <a href= https ror org 01ggx4157 >CERN< a>

Affiliated with an international laboratory covered by a cooperation agreement with <a href= https ror org 01ggx4157 >CERN< a>

Center for High Energy and High Field Physics and Dept of Physics National Central University 300 Zhongda Rd Zhongli 320317 Taiwan

Charles University Faculty of Mathematics and Physics 12116 Prague Czech Republic

Czech Technical University Prague 16636 Prague Czech Republic

Institute of Scientific Instruments of the CAS 61264 Brno Czech Republic

IRFU CEA Université Paris Saclay 91191 Gif sur Yvette France

LIP 1649 003 Lisbon Portugal

Ludwig Maximilians Universität 80539 München Germany

Matrivani Institute of Experimental Research and Education Calcutta 700 030 India

National Centre for Nuclear Research 02 093 Warsaw Poland

Technical University in Liberec 46117 Liberec Czech Republic

Technische Universität München Physik Dept 85748 Garching Germany

Tel Aviv University School of Physics and Astronomy 69978 Tel Aviv Israel

Trieste Section of INFN 34127 Trieste Italy

Universität Bochum Institut für Experimentalphysik 44780 Bochum Germany

Universität Bonn Helmholtz Institut für Strahlen und Kernphysik 53115 Bonn Germany

Universität Bonn Physikalisches Institut 53115 Bonn Germany

Universität Freiburg Physikalisches Institut 79104 Freiburg Germany

Universität Mainz Institut für Kernphysik 55099 Mainz Germany

University of Aveiro I3N Dept of Physics 3810 193 Aveiro Portugal

University of Illinois at Urbana Champaign Dept of Physics Urbana Illinois 61801 3080 USA

University of Miyazaki Miyazaki 889 2192 Japan

University of Torino Dept of Physics 10125 Torino Italy

University of Trieste Dept of Physics 34127 Trieste Italy

University of Warsaw Faculty of Physics 02 093 Warsaw Poland

Warsaw University of Technology Institute of Radioelectronics 00 665 Warsaw Poland

Yamagata University Yamagata 992 8510 Japan

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